(5x+15)(2x+6)=

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Solution for (5x+15)(2x+6)= equation:


Simplifying
(5x + 15)(2x + 6) = 0

Reorder the terms:
(15 + 5x)(2x + 6) = 0

Reorder the terms:
(15 + 5x)(6 + 2x) = 0

Multiply (15 + 5x) * (6 + 2x)
(15(6 + 2x) + 5x * (6 + 2x)) = 0
((6 * 15 + 2x * 15) + 5x * (6 + 2x)) = 0
((90 + 30x) + 5x * (6 + 2x)) = 0
(90 + 30x + (6 * 5x + 2x * 5x)) = 0
(90 + 30x + (30x + 10x2)) = 0

Combine like terms: 30x + 30x = 60x
(90 + 60x + 10x2) = 0

Solving
90 + 60x + 10x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '10'.
10(9 + 6x + x2) = 0

Factor a trinomial.
10((3 + x)(3 + x)) = 0

Ignore the factor 10.

Subproblem 1

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Subproblem 2

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Solution

x = {-3, -3}

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